p.haul: move get_ddxml_path
p.haul: move get_ddxml_path

move get_ddxml_path from class fs_haul_ploop to outstanding function
and add ploop directory handling

Signed-off-by: Alexander Burluka <e1a296dbcd92383e62ed2d193750f7aed5ae3091@virtuozzo.com>
Acked-by: Nikita Spiridonov <e2c2785991de10f66b050593578d4296c6c8705d@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@virtuozzo.com>

xemul/p.haul,xemul/p.haul,xemul/p.haul,aburluka/p.haul,arthurlockman/p.haul,xemul/p.haul,jne100/p.haul,arthurlockman/p.haul,xemul/p.haul,arthurlockman/p.haul,aburluka/p.haul,aburluka/p.haul,arthurlockman/p.haul,jne100/p.haul,aburluka/p.haul,jne100/p.haul,aburluka/p.haul,arthurlockman/p.haul,jne100/p.haul,jne100/p.haul